Much like the subject matter of this wonderful book, Edgar Levenson is an enigma. Even though he has published for over fifty years, his work is continuously contemporary. Even though he is the most well-known and subtle theorist of interpersonal psychoanalysis, he is a decisive critic of theory and theorizing. Levenson has made a truly original contribution to our understanding of psychoanalytic process, but at the same time, he has repeatedly warned against codifying this understanding into a specific technique of method or treatment. He has always been our foremost student and authority on process, and much like analytic process itself, Levenson eludes capture. He describes the ineffable nature of our work in a way that continues to change, to evolve, never settling onto a single set of concepts that might be elevated to a new orthodoxy. He challenges us to think anew, to experience with a fresh awareness never reduced to our conceptualizations. In this new book, we see Levenson's work at a new level of maturity, leap-frogging over the pervasive conundrums of our field today. Psychoanalysis across the world is finally coming to terms with concerns raised by Levenson since the beginning of his work. Current international interest in intersubjectivity, mutual influence, field phenomena, the limits of understanding and the importance of negative capacity have been continued interests for Levenson, raised in response to the fixity of a psychoanalytic theorizing that has not taken into account the effects of theory in process itself. This is Levenson's purview. But in his recent work, Levenson moves further, situating internal private experience in relation to the intersubjective, proposing a nuanced reflection on the role of perception in psychoanalytic process, offering as always a perspective that subtends dichotomies, but that here also finds new integrations without ever simply settling for making sense. One finds a unique pleasure in the encounter with Levenson. More than any other psychoanalyst, we read what Levenson writes, and we have an incarnation of his presence. Reading becomes an experience with him, a process in itself. We find ourselves shifted, in spite of ourselves, out of our familiar stance of knowing into an experience of being, into an encounter with the ineffable, always tilted from familiar moorings in a way that leads us to consider, and more importantly, to experience our work afresh. This is the Levenson idiom, one that offers a rare opportunity to play with him as he pursues psychoanalytic process and the enigmatic nature of experience. Jack Foehl, Ph.D., ABPP, Training & Supervising Analyst, Boston Psychoanalytic Society and Institute, Supervisor and Faculty, Massachusetts Institute for Psychoanalysis and Harvard Medical School, Associate Professor (Adjunct) NYU Postdoctoral Program in Psychotherapy and Psychoanalysis.